--------------------------------------------------------
Area of the base
--------------------------------------------------------
5 x 5 = 25 cm²
--------------------------------------------------------
Area of 1 triangle
--------------------------------------------------------
1/2 x 5 x 6 = 15 cm²
--------------------------------------------------------
Area of 4 triangles
--------------------------------------------------------
15 x 4 = 60 cm²
--------------------------------------------------------
Total Area
--------------------------------------------------------
60 + 25 = 85 cm²
--------------------------------------------------------
Answer: Total Surface Area = 85 cm²
--------------------------------------------------------